1. Chevrolet Climate Controls & Control Units To Buy
  2. sku: 11639787794688603
  3. STANDARD PRODUCTS 79187CYYS

STANDARD MOTOR PRODUCTS 79187CYYS Control Relay Smp A/c

fits make: Chevrolet. year: 1988–1996.

79187cyys Standard Motor Products For 1988-1994 1996 Chevrolet K1500 A/c Control Relay Smp 1991 1989

( Brand: Standard Motor Products ), ( Manufacturer Part Number: 79187CYYS ), ( Part Type: Control Motor ), ( Manufacturer Warranty: 12 Month Warranty ), ( Notes: A/c Compressor Control Relay ), ( Years: 1991 1988 1989 1990 1992 1993 1994 1996 ), ( Application: Chevrolet K1500 A/c Control Relay ), ( Cs-sku: 400 )

Review STANDARD MOTOR PRODUCTS Chevrolet A/c Control Relay Smp fits K1500 1988–1996

The **Standard Motor Products 79187CYYS** is a high-quality, precision-engineered **A/C Control Relay** designed specifically for **1988 1994 and 1996 Chevrolet K1500** pickup trucks, ensuring seamless integration with the vehicle s climate control system. This relay serves as a critical electrical switch, allowing the air conditioning compressor to engage and disengage based on signals from the vehicle s climate control module, thermostat, and pressure switches. Crafted with **durable, corrosion-resistant materials**, this relay is built to withstand the demanding conditions of under-the-hood environments, including temperature fluctuations, vibrations, and exposure to moisture, ensuring long-term reliability.

The **79187CYYS** features a **compact yet robust design**, incorporating a **normally open (NO) contact configuration** that provides a clean, high-capacity electrical connection when activated by the vehicle s control system. Its **spade terminals** ensure a secure and stable connection to the wiring harness, minimizing resistance and preventing loose contacts that could lead to intermittent A/C operation or failure. The relay s **spring-loaded mechanism** guarantees smooth and consistent engagement, reducing wear over time and maintaining optimal performance even after extensive use.

This relay is **directly compatible** with the **1989 1991 Chevrolet K1500 models**, as well as the **1996 iteration**, making it an ideal replacement for the original equipment (OEM) relay that may have failed due to age, corrosion, or electrical surges. Unlike generic aftermarket alternatives, the **Standard Motor Products 79187CYYS** adheres to strict manufacturing standards, ensuring proper fitment and functionality without the risk of compatibility issues. Whether replacing a faulty relay or upgrading for enhanced durability, this component is engineered to restore or improve the **efficiency and responsiveness** of the vehicle s air conditioning system, keeping passengers comfortable during hot weather or long drives.

For optimal performance, it is recommended to install this relay during routine maintenance or when diagnosing A/C-related issues such as the compressor failing to engage, unusual clicking noises from the relay, or erratic cooling behavior. Proper installation involves careful alignment of the terminals and secure fastening to prevent vibration-induced loosening, ensuring the relay operates as intended for years to come. With **Standard Motor Products reputation for quality and reliability**, this relay is a trusted choice for both professional mechanics and DIY enthusiasts seeking a dependable solution for their Chevrolet K1500 s climate control system.

### **Pros and Cons of Buying a Standard Motor 79187CYYS A/C Control Relay for a 1988-1994, 1996 Chevrolet K1500 (SMP 1991/1989 Compatibility)**

#### **Pros:**

1. **Direct Compatibility** The relay is specifically listed for the 1988-1994 and 1996 Chevrolet K1500 models, ensuring it fits without modification. The mention of "SMP 1991/1989" suggests it may also work for related small-block (L31/L34) engine applications, expanding its usefulness.

2. **Reliability of Standard Motor** Standard Motor is a well-known brand in automotive electrical components, offering parts that are generally durable and tested for performance. Their relays are often used in aftermarket and OEM applications.

3. **Easy Installation** Relays are straightforward to replace, requiring minimal tools and no wiring changes in most cases. The part is likely a direct drop-in replacement for the factory relay.

4. **Cost-Effective Fix** If the A/C control relay is failing, replacing it is a low-cost solution compared to diagnosing other potential issues (e.g., faulty compressor clutch, low refrigerant, or wiring problems).

5. **Widely Available** As a common part for older Chevy trucks, it can be found at auto parts stores (AutoZone, O Reilly, RockAuto), online retailers (Amazon, eBay, RockAuto), or directly from Standard Motor s distributors.

6. **Prevents Further Damage** A failing relay can cause intermittent A/C operation or complete failure. Replacing it early may prevent damage to the compressor clutch or other electrical components.

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#### **Cons:**

1. **Potential Counterfeit or Low-Quality Units** Purchasing from untrusted sellers (especially online marketplaces) may result in counterfeit or substandard relays that fail prematurely. Always buy from reputable sources.

2. **Mismatched Part Number Confusion** The part number (79187CYYS) may not cover all variations of the K1500 s A/C relay, particularly if the truck has unique wiring harnesses or aftermarket modifications. Verify the exact relay location and pinout before purchasing.

3. **Symptoms May Persist** If the issue is not solely the relay (e.g., a bad ground, faulty compressor clutch, or low refrigerant), replacing the relay alone may not resolve the problem. A thorough diagnosis is necessary.

4. **Age of the Vehicle** Older trucks may have worn wiring or corroded connections, which could cause the new relay to fail or perform inconsistently. Inspect the harness and connections during installation.

5. **Limited Longevity** While Standard Motor relays are generally reliable, they are not indestructible. If the truck is driven frequently in extreme conditions (e.g., high heat, frequent A/C use), the relay may wear out over time.

6. **Possible Overkill for Minor Issues** If the A/C system has other underlying problems (e.g., a failing compressor clutch or refrigerant leak), replacing just the relay is a temporary fix. Addressing the root cause is ideal.

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### **Conclusion:**

The **Standard Motor 79187CYYS A/C control relay** is a **practical and cost-effective solution** for replacing a faulty relay in a 1988-1994 or 1996 Chevrolet K1500, assuming the issue is isolated to the relay. Its compatibility with SMP engines (1989/1991) adds flexibility. However, **buyers should ensure they are purchasing an authentic part from a trusted source** to avoid counterfeits. Before installation, **verify the relay s pinout and wiring diagram** to confirm it matches the truck s harness. If the A/C system continues to malfunction after replacement, further diagnosis (compressor clutch, refrigerant, fuses, wiring) is necessary.

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### **Recommendation:**

1. **Purchase from a Reputable Source** Buy the relay from **AutoZone, O Reilly Auto Parts, RockAuto, or Standard Motor s official distributors** to avoid counterfeit parts. Check seller ratings on Amazon or eBay if buying online.

2. **Verify Compatibility** Confirm the relay s pinout matches your truck s wiring. Some K1500 models may require a slightly different relay (e.g., 79187CYYS vs. 79187CYYX). Consult a wiring diagram or a trusted mechanic if unsure.

3. **Inspect the Harness** Before installing, check the relay socket and wiring for corrosion, burns, or loose connections. Clean or replace damaged wires if needed.

4. **Test the Relay** Use a multimeter to test the relay s continuity and operation. Alternatively, swap it with a known-good relay (e.g., from another system) to isolate the issue.

5. **Address Underlying Issues** If the A/C still doesn t work after replacement, rule out:

- **Low refrigerant** (check pressure gauge).

- **Faulty compressor clutch** (listen for engagement when A/C is on).

- **Blown fuses or relay** (check the A/C fuse and other relays).

- **Bad ground or wiring** (inspect connections at the compressor and relay).

6. **Consider a Rebuilt or High-Quality Alternative** If the relay fails quickly, a **rebuilt or upgraded relay** (e.g., from **Delco, Bosch, or a premium brand**) may offer better longevity.

**Final Verdict:** The **79187CYYS relay is a solid choice for a direct replacement**, but **due diligence in sourcing and testing is essential** to ensure it resolves the issue. If the problem persists, a deeper diagnostic approach is warranted.

Details:

12 Month Warranty Fitment Notes: Vehicle: 1988 - 1994 Chevrolet K1500. Tested for performance and reliability. Parts Geek - For 1988 - 1994, 1996 Chevrolet K1500 A/C Control Relay SMP 79187CYYS 1991 1989: Review Fitment Notes to Ensure Proper Fit condition: New Brand: Standard Motor Products Notes: Compressor Terminal Quantity: 5 Connector 1 Mounting Bracket Included: Yes Contents: Features: Made from quality components for dependability. Fitment Notes: with 5 blade terminals, Vehicle: 1996 Chevrolet K1500.

part #: 79187cyys price

  • $20.75

specifications chvyacheatercontrols:

  • for makes: Chevrolet
  • for years: 1988-1996
  • brand: Standard Motor Products
  • mpn: 79187cyys
  • part type: Control Motor
  • manufacturer warranty: 12 Month Warranty
  • notes: A/c Compressor Control Relay
  • years: 1991 1988 1989 1990 1992 1993 1994 1996
  • application: Chevrolet K1500 A/c Control Relay
  • cs-sku: 400

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  • Car Truck Parts Accessories > Air Conditioning Heating > HVAC Controls Control Units
for makes: chevrolet, for years: 1988-1996, part type: control motor, manufacturer warranty: 12 month warranty, notes: a/c compressor control relay, years: 1991 1988 1989 1990 1992 1993 1994 1996, application: chevrolet k1500 a/c control relay, cs-sku: 400,
category: auto parts > car truck parts accessories > air conditioning heating > hvac controls control units, sku: 11639787794688603,
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  • New. Offer #1 priced at $20.75 + $0.00 shipping estimate = $20.75* total. Tested for performance and reliability 1988-1994 Chevrolet K1500.FREE SHIPPING
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